Reamer-head.



C. G. CASHMAN.

REAMER HEAD.

. I917. 1 384,593. Patented Nov. 12, 1918.

CLARENCE G. CASHMAN, F WAYNESBORO, PENNSYLVANIA.

REAMER-HEAD.

Specification of Letters Patent.

Patented Nov. 12, 1918.

Application filed January 12, 1917. Serial No. 142,007.

To all whom it may concern:

Be it known that I, CLARENCE Gr. CASH- MAN, a citizen of the United States, residing at WVaynesboro, Franklin county, and State of Pennsylvania, have invented and discovered certain new and useful Improvements in Reamer-Heads, of which the following is a specification.

My said invention relates to cutter and reamer heads and consists in the combinations and arrangements of elements hereinafter described and particularly set forth in the accompanying claims.

The purpose of the invention is to provide a cutter or reamer head of the radial adj ustable blade type having means for simulta neously adjusting the several blades through a compound screwing operation; and wherein the adjusting device acts to securely hold the blades in set position.

The invention has for its further purpose to provide a reamer blade adjusting device employing a minimum number of parts to the end of simplicity in construction, and wherein the adjustment of the blades may be elfected in a quick, simple and easily performed operation.

The invention is shown by way of illustration in the accompanying drawing, wherein,-

Figure 1 is a central longitudinal section through a reamer head, constructed in accordance with my said invention,

Fig. 2 is a transverse sectional view thereof taken on the line 2-2 of Fig. 1,

Fig. 3 is a similar view taken on the line 3-3,

Fig. 4 is a detail view, partly in section of the body of the reamer head, and

Fig. 5 is a perspective view of one of the reamer blades.

Referring to the construction in further detail, and wherein like reference characters designate corresponding parts, 6 represents the machine spindle on which the reamer head is mounted, 7 the body of said reamer head and 8 the several reamer blades.

The reamer head consists of a cylinder constructed for mounting on the machine mandrel, and is provided with a plurality of longitudinal grooves, or seats 9, arranged equidistant apart around its periphery, and adapted to receive and hold the reamer blades. Said seats or grooves are formed with their bottom surfaces inclined downward from the rear to front, and the reamer cross-section, by which a tool or wrench (not shown) may be inserted for turning the same. It is provided with a head 15 of relatively large diameter, and preferably formed integral therewith. Said head is provided with screw-threads, or a spiral rib 16, which engage with notches 17 formed-on the respective inner edges of the several blades after the manner shown in Fig. 1.

It will thus be seen that a compound screw is provided for quickly adjusting the several blades, either for spreading or retracting the blades which constitute the operative head or die, and the plural engagement between the head 15 and blades 8 affords a substantial securing device to hold the several blades rigidly in set position.

It will be obvious to those skilled in the art that various modifications in the details of construction and arrangement of parts may be made without departing from the spirit of my invention, and that the operative edge of the blades, whether smooth or serrated for threading is not material, and therefore I do not wish to be limited to any particular features except as may be re quired by the claims.

Having thus fully described my said invention, what I claim as new and desire to secure by Letters Patent, is

1. A cutting or reaming tool comprising a body formed with radially disposed grooves, blades slidably mounted in said grooves to have radial adjustment, and a compound screw engaging with said blades operable to impart radial adjustment thereto, substantially as set forth.

2. A cutting or reaming tool comprising a body formed with radially disposed grooves, blades adjustably mounted in said grooves, and a member adjustably mounted in said body havinv screw engagement with the blades operable to adjust the latter, substantially as set forth.

A cutting or reaming tool comprising a body formed with radially disposed grooves, blades adjustably mounted in said grooves, and a member screw-threaded in sald body having screw engagement with the blades operable to adjust the latter, substantially as set forth.

a. A cutting or reaming tool comprising a body formed with radially disposed grooves, blades slidably mounted in said grooves and constructed with notches respectively, said blades and grooves having complementary inclined portions; a member screw-threaded in said body and constructed to receive a tool, and a head mounted on said member having screw-threads engaging with the notches of the reamer blades operable to ad just said blades, substantially as set forth.

5. A cutting or reaming tool comprising a body formed with radially disposed grooves having inset portions, blades slidably mounted in said grooves and provided with notches and constructed with ribs fitting in said inset portions, said blades and grooves having complementary inclined portions to effect radial adjustment of the blades through longitudinal movement thereof; a member screwthreaded in said body and constructed to re- Gopies of this patent may he ceive a tool, and a head mounted on said member having screw-threads engaging with the notches of said blades to eifect adjustment of the latter, substantially as set forth.

6. A cutting or reaming tool comprising a body formed with radially disposed grooves spaced equidistant apart around its periphery, blades slidably mounted in said grooves and provided with notches on their respective inner rear edges, said blades and grooves having complementary inclined portions to effect radial adjustment of the blades through longitudinal movement thereof, a member screw-threaded in said body constructed to receive an adjusting tool, and a relatively large head mounted on said member having screw-threads engaged in the notches of said blades operable to adjust the latter, substantially as set forth.

In witness whereof I have hereunto set my hand and seal at \Vaynesboro, Pennsylvania, this 5th day of January, A. D. nineteen hundred and seventeen.

CLARENCE G. OASHMAN. [Its] Witnesses E. N. BRADFORD, ALF. N. RUssnLL.

obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). E. 

